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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
23/11/2011 |
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Data da última atualização: |
11/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DAVIDSON, E.; LEFEBVRE, P. A.; BRANDO, P. M.; RAY, D. M.; TRUMBORE, S. E.; SOLORZANO, L. A.; FERREIRA, J. N.; BUSTAMANTE, M. M. da C.; NEPSTAD, D. C. |
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Afiliação: |
Eric A. Davidson, Woods Hole Research Center; Paul A. Lefebvre, Woods Hole Research Center; Paulo M. Brando, IPAM; David Ray, Tall Timbers Research Station; Susan E. Trumbore, University of California; Luis A. Solorzano, The Gordon and Betty Moore Foundation; JOICE NUNES FERREIRA, CPATU; Mercedes M. da C. Bustamante, UNB; Daniel C. Nepstad, The Woods Hole Research Center. |
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Título: |
Carbon inputs and water uptake in deep soils of an Eastern Amazon forest. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Forest Science, v. 57, n. 1, p. 51-58, Feb. 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Rooting depth affects soil profiles of water uptake and carbon inputs. Here we explore the importance of deep roots in a mature tropical forest of eastern Amazonia, where a throughfall exclusion experiment was conducted to test the resilience of the forest to experimentally induced drought. We hypothesized that soil water depletion occurred below the depth previously measured by sensors in 11-m-deep soil pits and that only a small root biomass is necessary to affect water uptake and the isotopic signature of soil CO2. A noninvasive electrical profiling method demonstrated greater depletion of soil water in the 11?18 m depth increment in the exclusion plot compared with the control plot by the end of the 3rd year of the experiment. A fine root biomass of only 0.1 g/cm3 measured at 3?6 m was sufficient for soil water drawdown and for imparting an isotopic signature of modern soil 14CO2 in both plots. A soil 13CO2 profile indicated drought stress in the exclusion plot. Fine root inputs of organic C to deep soils are small with respect to the carbon dynamics of the forest, but the deep rooting habit clearly affects the ecosystem water balance and profiles of soil CO2. FOR. SCI. 57(1):51?58. |
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Palavras-Chave: |
Co2. |
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Thesagro: |
Água; Matéria Orgânica; Solo. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01928naa a2200265 a 4500
001 1906991
005 2022-11-11
008 2011 bl uuuu u00u1 u #d
100 1 $aDAVIDSON, E.
245 $aCarbon inputs and water uptake in deep soils of an Eastern Amazon forest.$h[electronic resource]
260 $c2011
520 $aRooting depth affects soil profiles of water uptake and carbon inputs. Here we explore the importance of deep roots in a mature tropical forest of eastern Amazonia, where a throughfall exclusion experiment was conducted to test the resilience of the forest to experimentally induced drought. We hypothesized that soil water depletion occurred below the depth previously measured by sensors in 11-m-deep soil pits and that only a small root biomass is necessary to affect water uptake and the isotopic signature of soil CO2. A noninvasive electrical profiling method demonstrated greater depletion of soil water in the 11?18 m depth increment in the exclusion plot compared with the control plot by the end of the 3rd year of the experiment. A fine root biomass of only 0.1 g/cm3 measured at 3?6 m was sufficient for soil water drawdown and for imparting an isotopic signature of modern soil 14CO2 in both plots. A soil 13CO2 profile indicated drought stress in the exclusion plot. Fine root inputs of organic C to deep soils are small with respect to the carbon dynamics of the forest, but the deep rooting habit clearly affects the ecosystem water balance and profiles of soil CO2. FOR. SCI. 57(1):51?58.
650 $aÁgua
650 $aMatéria Orgânica
650 $aSolo
653 $aCo2
700 1 $aLEFEBVRE, P. A.
700 1 $aBRANDO, P. M.
700 1 $aRAY, D. M.
700 1 $aTRUMBORE, S. E.
700 1 $aSOLORZANO, L. A.
700 1 $aFERREIRA, J. N.
700 1 $aBUSTAMANTE, M. M. da C.
700 1 $aNEPSTAD, D. C.
773 $tForest Science$gv. 57, n. 1, p. 51-58, Feb. 2011.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
13/02/2023 |
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Data da última atualização: |
13/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
NOVOTNY, E. H.; AZEVEDO, E. R. de; GODOY, G. de; CONSALTER, D. M.; COOPER, M. |
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Afiliação: |
ETELVINO HENRIQUE NOVOTNY, CNPS; EDUARDO RIBEIRO DE AZEVEDO, UNIVERSIDADE DE SÃO PAULO; GUSTAVO DE GODOY, UNIVERSIDADE DE SÃO PAULO; DANIEL MARTELOZO CONSALTER, FINE INSTRUMENT TECHNOLOGY; MIGUEL COOPER, UNIVERSIDADE DE SÃO PAULO. |
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Título: |
Determination of soil pore size distribution and water retention curve by internal magnetic field modulation at low field 1H NMR. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Geoderma, v. 431, 116363, Mar. 2023. |
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DOI: |
https://doi.org/10.1016/j.geoderma.2023.116363 |
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Idioma: |
Inglês |
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Conteúdo: |
The determination of the soil pore size distribution, water retention curve, and derived parameters that control important processes in soils, such as water supply for plants; infiltration; water and solute movement in soils; erosion; plant nutrients and contaminants transport, etc, are challenging and the available methods are expensive, time-consuming and prone to bias and errors. The use of 1H Nuclear Magnetic Resonance (NMR) relaxometry to characterise the soil porosity and hydraulic properties through spin-lattice and spin-spin relaxometry results in an ill-posed problem with two correlated unknown quantities: the pore length scales, and surface relaxivity. To overcome this limitation of NMR relaxometry, we propose the use of a method that directly accesses the NMR diffusion modes governed only by the pore size, and therefore, independent of the unknown surface relaxivity. The manuscript describes an unprecedent application in Soil Science of the Decay due to Diffusion in Internal Field (DDIF) method to successfully determine the pore size distribution of undisturbed soil samples, as well as to estimate the water retention curves from the pore size distribution. |
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Palavras-Chave: |
Curva de retenção de água; DDIF; Diffusion eigenmode detection; Pore length scales. |
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Thesagro: |
Porosidade; Retenção de Água no Solo. |
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Thesaurus NAL: |
Soil water retention. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1151694/1/Determination-of-soil-pore-size-distribution-2023.pdf
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Marc: |
LEADER 02044naa a2200265 a 4500
001 2151694
005 2023-03-13
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.geoderma.2023.116363$2DOI
100 1 $aNOVOTNY, E. H.
245 $aDetermination of soil pore size distribution and water retention curve by internal magnetic field modulation at low field 1H NMR.$h[electronic resource]
260 $c2023
520 $aThe determination of the soil pore size distribution, water retention curve, and derived parameters that control important processes in soils, such as water supply for plants; infiltration; water and solute movement in soils; erosion; plant nutrients and contaminants transport, etc, are challenging and the available methods are expensive, time-consuming and prone to bias and errors. The use of 1H Nuclear Magnetic Resonance (NMR) relaxometry to characterise the soil porosity and hydraulic properties through spin-lattice and spin-spin relaxometry results in an ill-posed problem with two correlated unknown quantities: the pore length scales, and surface relaxivity. To overcome this limitation of NMR relaxometry, we propose the use of a method that directly accesses the NMR diffusion modes governed only by the pore size, and therefore, independent of the unknown surface relaxivity. The manuscript describes an unprecedent application in Soil Science of the Decay due to Diffusion in Internal Field (DDIF) method to successfully determine the pore size distribution of undisturbed soil samples, as well as to estimate the water retention curves from the pore size distribution.
650 $aSoil water retention
650 $aPorosidade
650 $aRetenção de Água no Solo
653 $aCurva de retenção de água
653 $aDDIF
653 $aDiffusion eigenmode detection
653 $aPore length scales
700 1 $aAZEVEDO, E. R. de
700 1 $aGODOY, G. de
700 1 $aCONSALTER, D. M.
700 1 $aCOOPER, M.
773 $tGeoderma$gv. 431, 116363, Mar. 2023.
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